diff options
Diffstat (limited to 'Documentation/admin-guide/mm/transhuge.rst')
| -rw-r--r-- | Documentation/admin-guide/mm/transhuge.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst index e7232b46fe14..1f72b00af5d3 100644 --- a/Documentation/admin-guide/mm/transhuge.rst +++ b/Documentation/admin-guide/mm/transhuge.rst @@ -501,6 +501,19 @@ swpout_fallback Usually because failed to allocate some continuous swap space for the huge page. +file_alloc + is incremented every time a file huge page is successfully + allocated. + +file_fallback + is incremented if a file huge page is attempted to be allocated + but fails and instead falls back to using small pages. + +file_fallback_charge + is incremented if a file huge page cannot be charged and instead + falls back to using small pages even though the allocation was + successful. + As the system ages, allocating huge pages may be expensive as the system uses memory compaction to copy data around memory to free a huge page for use. There are some counters in ``/proc/vmstat`` to help |